Pneumatic actuating device



Sept. 17, 1929. M. FISCHER PNEUMATIC ACTUATING DEVICE Filed Feb. 26

MAranN FISCHER 'Parentaly Sept. 17,' 1929 "1,728,267

UNITED STATES PATENT OFFICE MARTIN FISCHER, F ZRICH, SWITZERLAND PNEUMATIG ACTUATING DEVICE Application led February 26, 1927, Serial No. 171,095, and in Germany March 23, 1926.

- The invention relates to electrical actuat- The latter is pivotally mounted on a bolt ing systems adapted to actuate clocks or 25 of the clockwork 23. On the actuating other controlling mechanisms. i arm is provided an actuating pawl 26 which The object of the inventionis to effect the is held in engagement with the teeth of an actuation electro-pneumatically and this reactuating wheel 9 by means of a spring 27. 55

sult is obtained by switching a heating body The actuating wheel 9 is provided on the into an electric circuit at regular time inter- Spring drum 8 of the clockwork 23 in such vals and for determined periods ottime by a manner. that when actuating the wheel 9 means of a clock. The heating body is by means of the pawl 26 the clockwork 10 mounted in a closed container from which spring is wound in the known manner. co

air pipes lead to the separate apparatus, When the spring unwinds it drives the clockclocks, and so forth to be actuated. When work w1th the wheel gears not shown in the the heating body is -switched in the air in drawing, known per se. The spring of the the container is heated. The air expands clockwork 23 is therefore automatically reand the air pressure wave thus produced is Wound so that a winding of the clock is not 65 transmitted by the said pipes to the appanecessary. 'lo the pipe 13 auxiliary clocks ratus lto be actuated. The latter are actu- 18, 19 are connected by the branch pipes 14. ated by suitable actuating mechanism in Each clock 18, 19 is provided with an actuagcordance with the magnitude and number ltlllg Wheel 16 COIHIGCSed t0 the hands, IDOV- 20 0f air pressure waves, ing over a dial by wheel gears (not shown in 70 In the drawing is illustrated diagramthedrawing) in such a manner that the matieally one ferm of construction 0f the auxiliary clocks are actuated in accordance subject of the invention. Wlth the movement of the master clock 23 In, a, Container 1, provided with rigid and ind1cate the correct time. The wheel walls,".. there is mounted an effectively insu- 16 S actuated by a PaWl 17 hinged t0 5h75 I lated heating wire coil 2. The heating wires piston 28. 'llhe piston 23 is arranged to be can be connected by a plug 3 to any eleceasily movable m the .cylinder 15 connected trical circuit, for example the lighting cir- 'O the plpe 13 by the plpe 14. The actuation cuit. In the circuit 4 in which the heatingl of the auxiliary clocks 18, 19 and the windao wire coil 2 and the plug 3 are included, there 111g of the master clock 23 may be effected, so is also included a switch 5. The latter is for example, every minute. In this case the .Y provdedwith a resilient tongue adapted C3111 21 .Would make 3. COIIlplee IeVOllltlOl t0 be pressed against 3, Stationary Contact 5 every minute so that each minute the circuit by a cam 21 so as to 'close the circuit through y4 is closed once and an air pressure wave is the heating wire coil 2. The cani 21 is transmitted through the pipe 13 to the cyl- S5 mounted on the shaft; 22 of a clockwork 23 inders 11 and 15. As soon as the circuit 4 regulated by a pendulum 7, During the is opened, a rapid cooling of the container operation of the clockwork the circuit l is ,l takes place. Ali' again flows out of the closed at regular intervals of time and kept Cylllders 1l, 15 back t0 the container 1. 4 0 closed for a definite period of time so that '111121015120118 12 and 28 are returned t0 their v90 the air in the Container 1 is beate@ In eeninitial position b y the external air pressure. sequence of the heatin the air expands. To What I Clalm 1S I the container 1 there is connected a pipe 13 1. In a thermo-pneumatic motor, a herof comparatively small bore through which metically sealed chamber provided with unthe air pressure wave produced in the conyielding walls, an expansible air in said 95 tainer 1 yis transmitted. The pipe 13 is conchamber, an electric heating device in said nected by branch pipes 14 to two cylinders chamber, mechanism at a relatively remote 11- and 15. In the cylinder 11 is provided point for controlling the operation of said a very easily movable piston 12. This is heating device in a predetermined inermithinged by a link 24 to an actuating arm 10. tent manner, means adjacent to said mech- 100 anism and operable by the expanding air Whenever said heating device functions for controlling said mechanism, and a conduit extending from said chamber tosaid means 5 to transmit said expanding air to said means.

2. In a thermo-pneumatic motor, a hermetically sealed chamber provided with unyielding Walls, an expansible air in said chamber, an electric heating device in said chamber, a conduit communicating with said chamber and into which the air may expand when said heating device is operated,

' and mechanism at a relatively remotey point operable by the air, expanding through said conduit for controlling the operation of said heating device. N

3. In a thermo-pneumatic motor, a hermetically sealed chamber provided W-ith'unyielding Walls, an expansible air in said chamber, an electric heating device in said chamber, clock mechanism for controlling the operation of said heating device in a predetermined intermittent manner, and means operable by the expanding air Whenever said heating device functions or controlling said clock mechanism.

4. In a thermo-pneumatic motor, a 'heri metically sealed chamber provided with unyielding Walls, an expansible air in said chamber, an electric heating device in said chamber, clock mechanism for controlling the operation of said heating device in a predetermined intermittent manner, and means operable by the expanding air Whenever said heating device functions for conf trolling said lclock mechanism, said lastnamed means including a conduitA having v`^runyielding Walls and extending from said 4Q chamber to said clock mechanism.

5. In a thermo-,pneumatic motor, a hermetically sealed chamber provided with uny yielding Walls, an expansible air in said chamber, an electric heating -device in said chamber, clock mechanism for controlling the operation of said heating device in a predetermined intermittent manner, `and means operable byk the expanding air Whenever said heating dvice functions for controlling said cloclvmechanism, said lastnamed means including a pawl and ratchet arrangement, a cylinder, a piston in the latter and operatively associated With'y said 'pawl and ratchet arrangement, and a conduit extending from said chamber to said cylinder to direct said expanding air against the piston to actuate the latter.

6. In a thermo-pneumatic motor, a hermetically sealed chamber provided With unyielding walls, an expansible air in said chamber, an electric heating` device in said chamber, clock mechanism for controlling thefoperation' `of said heating device in a predetermined intermittent manner, and

means operable by the expanding air When- -named means including a cylinder, a piston in the latter, a pavvl carriedby said piston,

a ratchet actuated bysaid pawl, and a con-y duit extendingfrom said chamber to said cylinder to direct said expanding air against the piston to actuate the latter.

7. In a thermo-pneumatic motor, a hermetically sealed chamber provided with unyielding Walls, an expansible air in said chamber, an electric heating device in said chamber, van electric circuit for said device, clock mechanism for controlling said circuit at predetermined intermittent times to operate said heating device., accordingly, and means operable by the expanding air Whenever said'heating device 'functions for controlling said clock mechanism.

8. In a thermo-pneumatic motor, a hermetically sealed vchamber provided with unyielding Walls, an expansible air in said chamber, an electricheating device in said chamber, an electric circuit for said device J and including a switch, clock mechanisln at a relatively remote point for intermittently actuating said switch in a predetermined manner to control the operation of said heating device accordingly, and means operable by the expanding air Whenever said heating device functionsv for controlling said clock mechanism.'

9. In a1 thermo-pneumatic motor, a hermetically sealed chamber provided with unyielding Walls, an expansible air in said chamber, an electric heating device in said chamber, an electric circuit for said device and including a switch, clock mechanism at a relatively remote point for intermittently actuating said switch, in a predetermined manner to control the operation of said heating device accordingly, and means operable by the expanding air whenever said heating device functions for controlling said clock mechanism, said last-named means includin a cylinder,`a piston therein, and a condult extending from said chamber to said cylinder and directing said expanding air against the piston to actuate the latter.

In testimony whereof I aliix my signature. MARTIN FISCHER. 

